Designed to fit perfectly and provide a secure seal, this valve cover comes with gaskets and bolts for easy installation. It is made with premium materials to ensure durability and longevity, guaranteeing that your engine stays protected and performs at its best. * Compatible with Avalanche 1500 2002-2008 * Compatible with Silverado 1500 2500 3500 1999-2008 * Compatible with Silverado 1500 2500 3500 Classic 2007 * Compatible with Suburban 1500 2500 2000-2008 * Compatible with Tahoe Camaro Corvette SSR Express 1500 2500 3500 Trailblazer Tiltmaster 1999-2008 * Compatible with Sierra 1500 2500 3500 1999-2008 * Compatible with Sierra 1500 2500 3500 Classic 2007 * Compatible with Yukon XL 1500 2500 Envoy Forward Savana 1500 2500 3500 2000-2008 * Compatible with Efastrack FT1061 Fastrack FT1261 FT1461 FT1601 FT1801 2004-2005 * Compatible with H2 H3 2003-2008, compatible with Rainier 2004-2007, compatible with CTS Escalade 2002-2008 * Compatible with Ascender NPR 2003-2008 * Compatible with Firebird G8 GTO 1999-2009 * Compatible with 9-7X 2005-2008 Package Includes: As shown in the figure. Optional a pair of red valve covers:1 x valve cover left side, 1 x valve cover right side, 8 x gaskets, 8 x bolts or optional one piece of silvery valve cover: 1 x valve cover left side, 4 x gaskets, 4 x bolts Replacement Part Number: Left side valve cover: 12570427 264-965 Right side valve cover: 12582224 264-994